The cradle, after modification. I removed the eject tab, and put the serial ribbon cable out through the hole. The ribbon cable connects to a real DB9 serial cable a few inches later, which is where I had to make sure I had the correct pinouts.
The front of the circuitboard. There is no place to attach wires. Older cradle models have a connector here which you can use to stick serial wires into.
The back of the circuitboard. I had to surface-mount solder 9 wires on.
When I modded my cradle, these were the pinouts I used:
serial cable wire colors: pin 1 black pin 2 brown pin 3 red pin 4 orange pin 5 yellow pin 6 green pin 7 blue pin 8 teal pin 9 white iPaq CON2 Pins -> serial colors: 1 (6) green 2 (7) blue 3 (8) teal 4 (2) brown 5 (3) red 6 (1) black 7 (4) orange 8 NC 9 (5) yellow (GND)Not all serial cables use the same colors, so be sure to check those!